The second beta Thunderbird 3

Mozilla has released the second public version of the Third Edition of its software for managing electronic mail.
Thunderbird 3 beta 2 brings a number of "background" improvements that are not directly visible to end users, but should provide faster and better manage e-mail.

From the news that we can see that the function of oversight of all interactions between electronic mail and Thunderbird, which is considerably simplifies troubleshooting problems when sending and receiving.
He also developed a new system for archiving messages and improved the management and e-mail based on the IMAP protocol.
For more information on Thunderbird 3 beta 2 can be found on the official website.